African Journal of Environmental Science and Technology 1996-0786Academic Journals10.5897/AJEST2018.2576AbdoulayeBouya DIOPBouyaDIOPAbdouKarim FAROTAAbabacarTHIAMAichetouDIADjibySARR* E-mail: bouya.diop@ugb.edu.sn20192802201907092018261020181327483
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